First, a lot more on the scary tornado in denver. It's 2:30 in the afternoon, george. You're in one of the largest, busiest airports in the world rushing to make your flight. And the pictures that came out of that area at that time, looked like this. That's the airport. You see the white peaks of the roof. That's the tornado right over it. And as crazy as the pictures are, the video's even worse. Watch as this ef-1 tornado makes a landing approach on the runways of denver international airport. Thousands of passengers at the terminals race to the basement and shelters as the funnel cloud nears. National weather service has issued a tornado warning. Reporter: The normally bustling concourses, eerily quiet. Nearly 10,000 travelers huddled nervously in the bathrooms, waiting for the all-clear, while severe thunderstorms and strong winds battered the runways. Those winds measured 97 miles per hour and were strong enough to knock out whether equipment. During the 40-minute tornado warning, nine flights were diversed.

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